Between the actual flight tickets, the ride to and from the airport, the extra service fees, and the pricey airport food, traveling can be pretty expensive. Luckily, there are some things you can get on the airplane for free, Melanie Glessing, a commercial flight attendant for American Airlines, told INSIDER.

Glessing said she's normally happy to give passengers whatever they ask for, but sometimes the plane doesn't have what customers want. It's important to keep in mind that some flights don't have extra things to spare and that the flight attendant doesn't have control over that. But usually, there are a few things you can ask for without having to pay any more money.

Glessing told INSIDER about six different things you can get on planes for no extra cost.

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Extra snacks are usually no cost.

Is that one pack of pretzels just not enough for you? Good news: You can almost always ask for more bags of snacks, free of charge, Glessing said. "Feel free to ask," she said. "Sometimes we're double-catered, depending on the flight." So, if you didn't get a chance to grab a meal (or if you didn't want to pay $16 for a sandwich), you can much on cookies, crackers, and pretzels for the duration of the flight.

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Full cans of soda are usually available.

Glessing told INSIDER that if a flight has more than 1,500 people on it, they will automatically hand out full cans of soda. But if you're on a smaller flight and would like more than one cup of pop (you're not alone), Glessing said you can ask the flight attendants.

"If someone specifically asks for the full can, we are typically happy to accommodate them," she said.

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Headphones are usually readily available.

Headphones are available on most flights.
Melia Robinson/Tech Insider

The most in-demand complimentary item you can snag on a plane? Headphones, Glessing said. "Most flights are catered with complimentary headphones," she said. "They go quick, and there usually isn't enough for each passenger." So if you forgot your headphones (again, you're not alone), you'll have to ask for a pair ASAP.

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Basic medication is often stocked — and free.

Flight attendants have basic medicine.
Caroline Praderio/INSIDER

Glessing told INSIDER that planes do have basic medicines like Aspirin and antacid. "But I wouldn't trust it," she said. "It sits on the plane for who knows how long." So if you're feeling like you might need some medicine for the flight, it's probably best to bring your own to make sure it's effective.

But if you're really in a pinch, you can always ask flight attendants for some. Just keep in mind, it may not work super well.

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Meet and greets with the captain are often free.

If you're on a little plane you can say hi to the captain during boarding.
Reuters

For security reasons, flights no longer offer tours of the cockpit. But if you're traveling with little ones, Glessing said flight attendants can set up a chance for them to say hi to the captain during boarding. Added bonus? Glessing said that sometimes the captains will allow you to take a picture of them with your children, if they're huge plane fans.

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Free alcoholic beverages are (sometimes) offered.

If you're seated in a certain place you can get free alcoholic beverages.Flickr/vxla

If you splurged for the extra legroom and are sitting in the first three rows of an American Airlines plane or the exit rows, you have access to one more free item. Glessing told INSIDER that you get free alcoholic beverages like wine, beer, or mixed drinks. If you're interested in having access to free booze, moving to the front of the plane might serve you well (pun intended).